How to lubricate the splines in your rear drive


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How to lubricate the splines in your rear drive

Post by WingAdmin » Thu Apr 02, 2009 6:15 am



The splines of the rear drive transmit the torque from the rear drive into the wheel itself. While the splines themselves move very little in relation to one another, there is some movement, so they must be greased, or else severe wear will occur. Once the splines are worn, you will experience driveline lash, and it will get worse as time goes on. There is no way to fix this other than to replace the rear drive - so this preventative maintenance is worth the time!

This is what happens if you do not lubricate these splines - these should be square, not triangular, and notice the chunks missing:

Image

Image

Because of the rotational forces within the rear drive, regular grease would be slung off the splines. Therefore, special Moly 60 paste should be used:

Image

The ONLY grease that should be used on the spline is genuine Moly 60 paste. This is not the place to cut corners!

**NOTE: Honda has discontinued the original Moly 60 paste shown above, and replaced it with high-Moly M-77 paste:

Honda M-77 Paste
Honda M-77 Paste

The drive side spline has a splined gear that extends outward, and rotates as the driveshaft rotates:

Image

The wheel side spline has a splined gear that accepts the drive side spline:

Image

The procedure explaining the removal of the wheel and drive unit, and applying the Moly 60 paste is covered in detail in How to remove and reinstall your rear wheel. You should lubricate your splines every time your rear wheel is removed!



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Re: How to lubricate the splines in your rear drive

Post by tech1 » Mon Aug 30, 2010 8:44 pm

I'm headed to my dealer tomorrow for the lube and try that.
Thanks I will post the results.

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Re: How to lubricate the splines in your rear drive

Post by BENJEE2112 » Mon Oct 15, 2012 10:46 am

Hey Wingadmin, Should I be putting red loctight on the threads of final drive,flange nuts? I had one missing and one loose when I removed it. also. Why are they different sizes? Thanks Ben

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Re: How to lubricate the splines in your rear drive

Post by WingAdmin » Mon Oct 15, 2012 10:57 am

BENJEE2112 wrote:Hey Wingadmin, Should I be putting red loctight on the threads of final drive,flange nuts? I had one missing and one loose when I removed it. also. Why are they different sizes? Thanks Ben
Are you talking about the three nuts that hold the final drive to the swingarm?

Image

If so:

- I'm not sure for the reason of the different flange sizes - possibly due to clearance issues?
- Properly torqued, they should not be coming loose, or require thread locker

The flanges on the nuts have small serrations that work like lock washers, to prevent the nuts from backing off when properly torqued:

Image

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Re: How to lubricate the splines in your rear drive

Post by BENJEE2112 » Mon Oct 15, 2012 11:12 am

thanks for the quick response. do you think it's okay to use thread lock anyway. just for backup?

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Re: How to lubricate the splines in your rear drive

Post by WingAdmin » Mon Oct 15, 2012 11:42 am

BENJEE2112 wrote:thanks for the quick response. do you think it's okay to use thread lock anyway. just for backup?
It's certainly not going to hurt anything to use it.

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Re: How to lubricate the splines in your rear drive

Post by BENJEE2112 » Mon Oct 15, 2012 12:35 pm

Thanks again. I've been down for 3 weeks and will be riding tomarrow. I rebuilt all 3 calipers.changed the rear tire. properlly molly'd the final drive. changed all caliper boots.including the anti dive boots.changed out the radiator.changed fork-oil (ATF).now all I have to do is throw the body parts back on today. I love this site.And apreciate all the help.

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Re: How to lubricate the splines in your rear drive

Post by SteveB123 » Mon Oct 15, 2012 5:44 pm

BENJEE2112 wrote:Hey Wingadmin, Should I be putting red loctight on the threads of final drive,flange nuts?
Red loctite is the permanent stuff. You'll need a torch if you want those nuts off again. Ever.

The blue stuff is what you want.
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Re: How to lubricate the splines in your rear drive

Post by BENJEE2112 » Mon Oct 15, 2012 6:18 pm

Thanks Steve Thats what I thought. I even asked the dude at the auto store about that. I'm going to get the Blue.I will definatly be removing them again,for tires-brakes ect...I'm glad it started raining earlier,because I stopped working out there,and it would have been done. so thanks for saving me the grief.. This Site Rocks

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Re: How to lubricate the splines in your rear drive

Post by stevo7108 » Sat Mar 29, 2014 9:57 pm

I must say the article and pictures made the job easier. Started out just changing brake pads but decided to check drive shaft and final drive splines while I had most everything off anyway. The pictures of the worn and rusted out splines were a good motivator! Good thing I did as I discovered an o-ring on the final drive to drive shaft coupling was partially cut. According to the parts list it took a 60mm but found out it's actually 47mm x 2.5mm. The local dealer didn't have the part but found one at: Coffey County Honda in New Strawn, KS (620)-364-2285. They have some parts for older GW's as they were the 5th Honda dealer in the US.
Splines are in good condition as they were lubed in the past.

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Re: How to lubricate the splines in your rear drive

Post by linkbelt » Wed Sep 17, 2014 7:05 pm

Thanks for the step-by-step. I had my saddle bags off to remove my rear brake system chasing the phantom brake drag so after reading this I figured "what the heck, I've come this far" and removed my rear tire and had a look at the drive shaft and hub splines. This is the first one I've seen but it looks alright to me. I figure I can just clean it up re-lube, change the drive oil and be ready when my rear master comes back. (Maybe rub on things a bit)
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Re: How to lubricate the splines in your rear drive

Post by roadwanderer2 » Fri Jun 05, 2015 7:08 am

hey wingadmin, i have a question to ask you about the moly paste....can this product also be used....http://www.napaonline.com/Catalog/Catal ... 0006410103

stuart.

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Re: How to lubricate the splines in your rear drive

Post by Aussie81Interstate » Fri Jun 05, 2015 6:15 pm

Stuart,

no way I would use that moly.

If you look at the data sheet - it only contains .2 to 1% moly. Honda specified 60% - so it is a LONG way away from what is required.

I wouldn't want my scotch diluted to that extent.. :)

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Re: How to lubricate the splines in your rear drive

Post by roadwanderer2 » Fri Jun 05, 2015 6:43 pm

Aussie81Interstate wrote:Stuart,

no way I would use that moly.

If you look at the data sheet - it only contains .2 to 1% moly. Honda specified 60% - so it is a LONG way away from what is required.

I wouldn't want my scotch diluted to that extent.. :)
well, its too late, its in and everything is back together. i'll take it back apart and go thru it again about a week before i leave for Florida. not surprisingly to say, when i got it apart, it was a mess. everything was brown in color, but all the splines were still in good shape. i don't know what the PO used in it, but it was almost bone dry. believe it or not, that's where all my scraping noise was coming from. i thought it was from the clutch or the transmission, but it was the final drive that was making all that noise. now that it has all that paste in it, its nice and quiet, the way it should be. i worked on it a little at a time all day starting at around 8:30 this morning and got everything back together again around 4pm.

stuart.

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Re: How to lubricate the splines in your rear drive

Post by WingAdmin » Mon Jun 08, 2015 11:02 am

Yeah, I wouldn't run that stuff in my splines for more than a few days. Unlike Moly, which is designed to lubricate under tremendous pressure (which is why it is specified for this application), that Napa grease is mostly just...grease, with a tiny, tiny amount of Moly. The pressure of spline on spline will squeeze it out very quickly, leaving you with no lubrication at all.

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Re: How to lubricate the splines in your rear drive

Post by roadwanderer2 » Mon Jun 08, 2015 3:38 pm

WingAdmin wrote:Yeah, I wouldn't run that stuff in my splines for more than a few days. Unlike Moly, which is designed to lubricate under tremendous pressure (which is why it is specified for this application), that Napa grease is mostly just...grease, with a tiny, tiny amount of Moly. The pressure of spline on spline will squeeze it out very quickly, leaving you with no lubrication at all.
i'll pull it apart again before i leave for Florida and redo the moly with the proper viscosity.

stuart.

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Re: How to lubricate the splines in your rear drive

Post by winguyjo » Mon Apr 22, 2019 10:17 pm

am at the stage on Wing3 where i want to install the final drive and rear wheel. having no experience in this area i thought i would pull out the FSM and read a bit.
the honda recommendation calls for " lithium based multipurpose NLGI No.2 (MOS2 additive)". there are plenty of greases out there with molybdenum disulphide added but in much lower concentrates than the 60% recommended here. i did buy a small tube of the honda m77 last year, having read this how-to and knowing that the job was pending, and will certainly use it since i have it in stock, but i have to wonder where this 60% moly content requirement comes from ?

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Re: How to lubricate the splines in your rear drive

Post by WingAdmin » Mon Apr 22, 2019 10:59 pm

winguyjo wrote:
Mon Apr 22, 2019 10:17 pm
am at the stage on Wing3 where i want to install the final drive and rear wheel. having no experience in this area i thought i would pull out the FSM and read a bit.
the honda recommendation calls for " lithium based multipurpose NLGI No.2 (MOS2 additive)". there are plenty of greases out there with molybdenum disulphide added but in much lower concentrates than the 60% recommended here. i did buy a small tube of the honda m77 last year, having read this how-to and knowing that the job was pending, and will certainly use it since i have it in stock, but i have to wonder where this 60% moly content requirement comes from ?
In the spline application, the splines are not moving against one another (well they are, but only a very tiny amount, with driveline lash). They are however pressed against each other with an incredible amount of pressure. This is why high Moly grease is required. Regular grease will be squeezed out from between the spline teeth very rapidly, and the centrifugal force of the rotation will fling the grease out and away. Essentially the only part of the grease being used is the moly part - and often "moly" grease has only 2.5% moly in it, so basically none.

Moly grease contains molybdenum - the "grease" component of moly grease is just a carrier, to transport the moly to the surface being protected. As the splines press together, they squeeze out the grease carrier, but leaves behind a coating of moly, which is left on both surfaces of the splines. This is what provides the required lubrication - the thin layer of moly, not the carrier grease, which is squeezed out and flung away.

So basically, using regular non-moly or low-moly grease is not a whole lot better than using no lubrication as well.

Using high-percentage moly grease on all your driveline splines is not a luxury, it is a requirement.

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Re: How to lubricate the splines in your rear drive

Post by winguyjo » Mon Apr 22, 2019 11:40 pm

hi, wingadmin , and thanks for the reply.
i get the need for the mso2 additive, honda clearly specifies it in their own service manual, but my question remains ... honda herself does not specify 60% so i am wondering where that figure comes from, e.g. a technical bulletin or ??? my wings are 37 and 39 years old, rear ends quiet and tight, and it's not hard to imagine that the only service that most shaft drive rear ends have ever seen is a change of gear oil, i.e. still running on whatever the factory put on those splines.

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Re: How to lubricate the splines in your rear drive

Post by WingAdmin » Tue Apr 23, 2019 8:13 am

winguyjo wrote:
Mon Apr 22, 2019 11:40 pm
hi, wingadmin , and thanks for the reply.
i get the need for the mso2 additive, honda clearly specifies it in their own service manual, but my question remains ... honda herself does not specify 60% so i am wondering where that figure comes from, e.g. a technical bulletin or ??? my wings are 37 and 39 years old, rear ends quiet and tight, and it's not hard to imagine that the only service that most shaft drive rear ends have ever seen is a change of gear oil, i.e. still running on whatever the factory put on those splines.
Definitely not. We have had members here who have had bikes whose owners neglected to lubricate those splines, and the splines completely wore away, to the point where the bike wouldn't move anymore. The moly lubrication is a required maintenance item.

As for the moly content, Honda specifies 60% Moly grease in the service manual:

Moly spec
Moly spec

Moly-60 paste is no longer available, the official Honda replacement is Honda M-77 paste. This is made by Dow Corning, and the MSDS for it shows that it contains between 55% and 75% moly.

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Re: How to lubricate the splines in your rear drive

Post by winguyjo » Tue Apr 23, 2019 10:03 am

... and there's my problem !
i have a 1980 - 1983 honda gl1100 factory service manual.
no matter how many times i look through : general info, specs, maintenance, and final drive, i dont see that chart.
sorry to be a pest about this but ... what page is that on ?

thanks again for all the help you provide , wingadmin.

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Re: How to lubricate the splines in your rear drive

Post by BENJEE2112 » Tue Apr 23, 2019 7:28 pm

Winguyjo. use the M-77...…. You said you have never done it. We "have" Many of us, many times, for many years. Don't overthink it. :? You asked for advice. You got answers. I did it to my 82 years ago. Just did it to my 1500. It's messy. Get a bunch of cheap gloves and a roll of paper towels. Good luck.....end of discussion. 8-)

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Re: How to lubricate the splines in your rear drive

Post by winguyjo » Tue Apr 23, 2019 8:36 pm

benjee ... thanks for participating.

still looking for the page that this information is on. if my manual doesn't have that info, then there's possibly other important info that it is missing. i suspect that it might be a reproduction, because the photos sure are not honda quality.

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Re: How to lubricate the splines in your rear drive

Post by Good Hondog » Tue Apr 23, 2019 10:44 pm

winguyjo wrote:
Tue Apr 23, 2019 8:36 pm
still looking for the page that this information is on. if my manual doesn't have that info, then there's possibly other important info that it is missing. i suspect that it might be a reproduction, because the photos sure are not honda quality.
I have both the reprint manual and the original factory published manual. The information in both manuals is identical. No charts, photos, or tables are omitted in the reprint manual. Go to the final drive chapter of the 80-83 manual and look on page 11-13 at the top of the page. It clearly states "Apply lithium based multipurpose NLGI No. 2 grease (MOS2 additive) to the pinion shaft and inside the pinion joint." Now go to page 11-14. Top of the page it states "Apply lithium based multi purpose NLGI No. 2 (MOS2 additive) grease to the drive and pinion shaft splines." The next picture down from that is the final driven gear and the rear wheel. The paragraph for that states "Apply lithium based multipurpose NLGI No.2 (MOS2 additive) grease to the damper pins, final driven gear's inner surface and splines, and to the final driven gear flange splines."

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Re: How to lubricate the splines in your rear drive

Post by winguyjo » Tue Apr 23, 2019 11:22 pm

hi, good hondog ... thanks for the feedback.
that is exactly what my manual states, and is what precipitated my question regarding the M77.
the thing that is driving me crazy is that i can't find that little section in the manual that wingadmin included in his last reply and it's making me think that either i may be missing some pages or the brain is decaying faster than i thought. :?



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